1) Don't be afraid to write. Often times, ideas may seem stupid to you, or you might be afraid your readers won't like it. That's okay; use it anyways. November's just for writing. You've got the rest of your life to edit.
2) On that note, NEVER LISTEN TO YOUR INNER EDITOR DURING NOVEMBER. The urge to edit as you go is very, very tempting, but it'll only waste precious time.
3) Try to get at least the minimum word count each day. 1,667 words seems like quite a bit, but often times it can pass by relatively quickly. I tend to world-build a lot, so descriptive paragraphs have saved my bacon more than once.
4) Keep a notebook/journal/notepad/whatever on you at all times. Inspiration strikes at the weirdest of places and times, so being prepared helps get ideas down, even if it's just a short description of a place or a character idea. I keep a small journal in my purse and a notebook by my bed, just in case. Also, writing utensils: get used to having many of them nearby at all times.
5) Sometimes, your characters will go places and do things you weren't expecting. That's fine; in fact, it often leads to ideas you hadn't thought of that further the story and make it more interesting. A story is a tapestry of various events and ideas; let them flow as they come.
6) Plan ahead. This is actually encouraged by the Office of Letters and Light (the very awesome people who run NaNo). Write down character bios. Sketch places. Take pictures of things that interest you or inspire you. Write down outlines of scenes that pop into your head.
7) Try to go to at least one write-in that's being hosted in your area. Chances are, there'll be one, or, most likely, several, at various bookshops, libraries, and schools. The NaNo Forums are a great place to hook up with people in your area. Getting live feedback is a great motivator.
8) Get to know your characters. Why do they do the things they do? What're their backgrounds? How much of them do you want to show the reader, and how much do you want to keep for yourself? Remember, not knowing everything often leads to keeping the reading wanting to know more about the characters, so dole out bits and pieces here and there to whet their appetites and keep them coming back for more.
9) Listen to your heart, not your head. Your head is full of boring things like work, school, and all the mundanities of life. Your heart, on the other hand, is where the dreams live and where your story can really take root. If you're excited about your story, chances are your readers will be as well.
10) Don't be afraid to steal borrow inspiration. Every great artist copies someone else at one point or another; why do you think so many of us got our start writing fanfiction? If an idea strikes you as interesting, note it down and then see how you can add your own personal spin on it. Don't be afraid to play around with established tropes and ideas. They've been around for a long time, so no one's going to yell if you use them. Just look at the amount of vampire and werewolf-related stuff for young adults that came out after Twilight hit the shelves.